Game Boy Advance System Recharged Refurbished
I havent bought it yet but I saw an answer on a similar case with a gba sp. a likely reason its so cheap is that the original gba doesnt have rechargable battery or backlight and that this is an offbrand gba (offbrand means it wasnt made by nintendo)
Pokemon sapphire is a GBA game, this is a GBA. Yes, you will be able to play pokemon sapphire on it unless its the remake
Lemme give you the run down from what i know. Gameboy Advance: no backlight unless you want to mod it, plays all Gameboy games. Gameboy Advance SP: Look for the AGS - 101 Model for a back light, plays all Gameboy games. DS: I think the DS has a better screen don't take my word on that, it can play only Gameboy advance and ds games. Take what I'm saying with a grain of salt, out of all of the handhelds I listed I've only used the DS extensively and the Gameboy Advance SP once, I'm simply repeating what I've heard before so make sure to do your own research.
Yes, the Gameboy Advance, the Gameboy Advance SP and the Gameboy Micro play all of the gameboy advance games. Both the Gameboy Advance and the Gameboy Advance SP also play old school gameboy and gameboy color games. The Gameboy Micro only plays gameboy advance games, it is not backwards compatible with gameboy and gameboy color games.